mid-15c. (adj.), c. 1600 (n.), from French descendant (13c.), present participle of descendre (see descend). Despite a tendency to use descendent for the adjective and descendant for the noun, descendant seems to be prevailing in all uses and appears 5 times more often than its rival in books printed since 1900. Compare dependant.
1. His design was a descendant of a 1956 device.
2. She is a direct descendant of Queen Victoria.
3. He was an O'Conor and a direct descendant of the last High King of Ireland.
4. a lineal descendant of the company's founder
5. He is a lineal descendant of the company's founder.